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Cisco ASR 9000 Series Aggregation Services Router Getting Started Guide
OL-28417-02
Chapter Configuring Additional Router Features
Configuring Logging and Logging Correlation
In addition, you can define correlation rules that group and summarize related events, generate complex
queries for the list of logged events, and retrieve logging events through an XML interface.
The following sections describe logging and the basic commands used to log messages in
Cisco IOS XR software:
• Logging Locations and Severity Levels, page 91
• Alarm Logging Correlation, page 91
• Configuring Basic Message Logging, page 92
• Disabling Console Logging, page 94
Logging Locations and Severity Levels
Table 10 shows error messages that can be logged to a variety of locations.
Table 11 shows how you can log messages based on the severity level of the messages.
Alarm Logging Correlation
Alarm logging correlation is used to group and filter similar messages to reduce the amount of redundant
logs and isolate the root causes of the messages.
For example, the original message describing the online insertion and removal (OIR) and system state
being up or down can be reported, and all subsequent messages reiterating the same event can be
correlated. When you create correlation rules, a common root event that is generating larger volumes of
Table 10 Logging Locations for System Error Messages
Logging Destination Command (Global Configuration Mode)
console logging console
vty terminal logging monitor
external syslog server logging trap
internal buffer logging buffered
Table 11 Logging Severity Levels for System Error Messages
Level Description
Level 0—Emergencies System has become unusable.
Level 1—Alerts Immediate action needed to restore system stability.
Level 2—Critical Critical conditions that may require attention.
Level 3—Errors Error conditions that may help track problems.
Level 4—Warnings Warning conditions that are not severe.
Level 5—Notifications Normal but significant conditions that bear notification.
Level 6—Informational Informational messages that do not require action.
Level 7—Debugging Debugging messages are for system troubleshooting only.
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